#include "userCrc16.h"

#define CRC_TYPE    1

#if (CRC_TYPE == 0)
const unsigned short CRC16_TABLE[256] = {
        0x0000, 0x8005, 0x800F, 0x000A,0x801B, 0x001E, 0x0014, 0x8011, 
        0x8033, 0x0036, 0x003C, 0x8039,0x0028, 0x802D, 0x8027, 0x0022, 
        0x8063, 0x0066, 0x006C, 0x8069,0x0078, 0x807D, 0x8077, 0x0072, 
        0x0050, 0x8055, 0x805F, 0x005A,0x804B, 0x004E, 0x0044, 0x8041, 
        0x80C3, 0x00C6, 0x00CC, 0x80C9,0x00D8, 0x80DD, 0x80D7, 0x00D2, 
        0x00F0, 0x80F5, 0x80FF, 0x00FA,0x80EB, 0x00EE, 0x00E4, 0x80E1, 
        0x00A0, 0x80A5, 0x80AF, 0x00AA,0x80BB, 0x00BE, 0x00B4, 0x80B1, 
        0x8093, 0x0096, 0x009C, 0x8099,0x0088, 0x808D, 0x8087, 0x0082, 
        0x8183, 0x0186, 0x018C, 0x8189,0x0198, 0x819D, 0x8197, 0x0192, 
        0x01B0, 0x81B5, 0x81BF, 0x01BA,0x81AB, 0x01AE, 0x01A4, 0x81A1, 
        0x01E0, 0x81E5, 0x81EF, 0x01EA,0x81FB, 0x01FE, 0x01F4, 0x81F1, 
        0x81D3, 0x01D6, 0x01DC, 0x81D9,0x01C8, 0x81CD, 0x81C7, 0x01C2, 
        0x0140, 0x8145, 0x814F, 0x014A,0x815B, 0x015E, 0x0154, 0x8151, 
        0x8173, 0x0176, 0x017C, 0x8179,0x0168, 0x816D, 0x8167, 0x0162, 
        0x8123, 0x0126, 0x012C, 0x8129,0x0138, 0x813D, 0x8137, 0x0132, 
        0x0110, 0x8115, 0x811F, 0x011A,0x810B, 0x010E, 0x0104, 0x8101, 
        0x8303, 0x0306, 0x030C, 0x8309,0x0318, 0x831D, 0x8317, 0x0312, 
        0x0330, 0x8335, 0x833F, 0x033A,0x832B, 0x032E, 0x0324, 0x8321, 
        0x0360, 0x8365, 0x836F, 0x036A,0x837B, 0x037E, 0x0374, 0x8371, 
        0x8353, 0x0356, 0x035C, 0x8359,0x0348, 0x834D, 0x8347, 0x0342, 
        0x03C0, 0x83C5, 0x83CF, 0x03CA,0x83DB, 0x03DE, 0x03D4, 0x83D1, 
        0x83F3, 0x03F6, 0x03FC, 0x83F9,0x03E8, 0x83ED, 0x83E7, 0x03E2, 
        0x83A3, 0x03A6, 0x03AC, 0x83A9,0x03B8, 0x83BD, 0x83B7, 0x03B2, 
        0x0390, 0x8395, 0x839F, 0x039A,0x838B, 0x038E, 0x0384, 0x8381, 
        0x0280, 0x8285, 0x828F, 0x028A,0x829B, 0x029E, 0x0294, 0x8291, 
        0x82B3, 0x02B6, 0x02BC, 0x82B9,0x02A8, 0x82AD, 0x82A7, 0x02A2, 
        0x82E3, 0x02E6, 0x02EC, 0x82E9,0x02F8, 0x82FD, 0x82F7, 0x02F2, 
        0x02D0, 0x82D5, 0x82DF, 0x02DA,0x82CB, 0x02CE, 0x02C4, 0x82C1, 
        0x8243, 0x0246, 0x024C, 0x8249,0x0258, 0x825D, 0x8257, 0x0252, 
        0x0270, 0x8275, 0x827F, 0x027A,0x826B, 0x026E, 0x0264, 0x8261, 
        0x0220, 0x8225, 0x822F, 0x022A,0x823B, 0x023E, 0x0234, 0x8231, 
        0x8213, 0x0216, 0x021C, 0x8219,0x0208, 0x820D, 0x8207, 0x0202,
};

/*
**name:get_crc16
**function:
**input:
**return:
*/
unsigned short get_crc16(unsigned char data, unsigned short crc)
{
        unsigned char c;

       c = crc >> 8;
        crc <<= 8;
        crc ^= CRC16_TABLE[data ^ c];
        return crc;
}
#elif (CRC_TYPE == 1)
const unsigned short CRC16R_TABLE[256] = {
        0x0000, 0xC0C1, 0xC181, 0x0140,0xC301, 0x03C0, 0x0280, 0xC241, 
        0xC601, 0x06C0, 0x0780, 0xC741,0x0500, 0xC5C1, 0xC481, 0x0440, 
        0xCC01, 0x0CC0, 0x0D80, 0xCD41,0x0F00, 0xCFC1, 0xCE81, 0x0E40, 
        0x0A00, 0xCAC1, 0xCB81, 0x0B40,0xC901, 0x09C0, 0x0880, 0xC841, 
        0xD801, 0x18C0, 0x1980, 0xD941,0x1B00, 0xDBC1, 0xDA81, 0x1A40, 
        0x1E00, 0xDEC1, 0xDF81, 0x1F40,0xDD01, 0x1DC0, 0x1C80, 0xDC41, 
        0x1400, 0xD4C1, 0xD581, 0x1540,0xD701, 0x17C0, 0x1680, 0xD641, 
        0xD201, 0x12C0, 0x1380, 0xD341,0x1100, 0xD1C1, 0xD081, 0x1040, 
        0xF001, 0x30C0, 0x3180, 0xF141,0x3300, 0xF3C1, 0xF281, 0x3240, 
        0x3600, 0xF6C1, 0xF781, 0x3740,0xF501, 0x35C0, 0x3480, 0xF441, 
        0x3C00, 0xFCC1, 0xFD81, 0x3D40,0xFF01, 0x3FC0, 0x3E80, 0xFE41, 
        0xFA01, 0x3AC0, 0x3B80, 0xFB41,0x3900, 0xF9C1, 0xF881, 0x3840, 
        0x2800, 0xE8C1, 0xE981, 0x2940,0xEB01, 0x2BC0, 0x2A80, 0xEA41, 
        0xEE01, 0x2EC0, 0x2F80, 0xEF41,0x2D00, 0xEDC1, 0xEC81, 0x2C40, 
        0xE401, 0x24C0, 0x2580, 0xE541,0x2700, 0xE7C1, 0xE681, 0x2640, 
        0x2200, 0xE2C1, 0xE381, 0x2340,0xE101, 0x21C0, 0x2080, 0xE041, 
        0xA001, 0x60C0, 0x6180, 0xA141,0x6300, 0xA3C1, 0xA281, 0x6240, 
        0x6600, 0xA6C1, 0xA781, 0x6740,0xA501, 0x65C0, 0x6480, 0xA441, 
        0x6C00, 0xACC1, 0xAD81, 0x6D40,0xAF01, 0x6FC0, 0x6E80, 0xAE41, 
        0xAA01, 0x6AC0, 0x6B80, 0xAB41,0x6900, 0xA9C1, 0xA881, 0x6840, 
        0x7800, 0xB8C1, 0xB981, 0x7940,0xBB01, 0x7BC0, 0x7A80, 0xBA41, 
        0xBE01, 0x7EC0, 0x7F80, 0xBF41,0x7D00, 0xBDC1, 0xBC81, 0x7C40, 
        0xB401, 0x74C0, 0x7580, 0xB541,0x7700, 0xB7C1, 0xB681, 0x7640, 
        0x7200, 0xB2C1, 0xB381, 0x7340,0xB101, 0x71C0, 0x7080, 0xB041, 
        0x5000, 0x90C1, 0x9181, 0x5140,0x9301, 0x53C0, 0x5280, 0x9241, 
        0x9601, 0x56C0, 0x5780, 0x9741,0x5500, 0x95C1, 0x9481, 0x5440, 
        0x9C01, 0x5CC0, 0x5D80, 0x9D41,0x5F00, 0x9FC1, 0x9E81, 0x5E40, 
        0x5A00, 0x9AC1, 0x9B81, 0x5B40,0x9901, 0x59C0, 0x5880, 0x9841, 
        0x8801, 0x48C0, 0x4980, 0x8941,0x4B00, 0x8BC1, 0x8A81, 0x4A40, 
        0x4E00, 0x8EC1, 0x8F81, 0x4F40,0x8D01, 0x4DC0, 0x4C80, 0x8C41, 
        0x4400, 0x84C1, 0x8581, 0x4540,0x8701, 0x47C0, 0x4680, 0x8641, 
        0x8201, 0x42C0, 0x4380, 0x8341,0x4100, 0x81C1, 0x8081, 0x4040, 
};

/*
**name:get_crc16
**function:
**input:
**return:
*/
unsigned short get_crc16r(unsigned char data, unsigned short crc)
{
        unsigned char c;

        c = crc & 0xff;
        crc >>= 8;
        crc ^= CRC16R_TABLE[data ^ c];
        return crc; 
}

#elif (CRC_TYPE == 2)

const unsigned short CCITT_CRC16_TABLE[256] = {
        0x0000, 0x1021, 0x2042, 0x3063,0x4084, 0x50A5, 0x60C6, 0x70E7, 
        0x8108, 0x9129, 0xA14A, 0xB16B,0xC18C, 0xD1AD, 0xE1CE, 0xF1EF, 
        0x1231, 0x0210, 0x3273, 0x2252,0x52B5, 0x4294, 0x72F7, 0x62D6, 
        0x9339, 0x8318, 0xB37B, 0xA35A,0xD3BD, 0xC39C, 0xF3FF, 0xE3DE, 
        0x2462, 0x3443, 0x0420, 0x1401,0x64E6, 0x74C7, 0x44A4, 0x5485, 
        0xA56A, 0xB54B, 0x8528, 0x9509,0xE5EE, 0xF5CF, 0xC5AC, 0xD58D, 
        0x3653, 0x2672, 0x1611, 0x0630,0x76D7, 0x66F6, 0x5695, 0x46B4, 
        0xB75B, 0xA77A, 0x9719, 0x8738,0xF7DF, 0xE7FE, 0xD79D, 0xC7BC, 
        0x48C4, 0x58E5, 0x6886, 0x78A7,0x0840, 0x1861, 0x2802, 0x3823, 
        0xC9CC, 0xD9ED, 0xE98E, 0xF9AF,0x8948, 0x9969, 0xA90A, 0xB92B, 
        0x5AF5, 0x4AD4, 0x7AB7, 0x6A96,0x1A71, 0x0A50, 0x3A33, 0x2A12, 
        0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E,0x9B79, 0x8B58, 0xBB3B, 0xAB1A, 
        0x6CA6, 0x7C87, 0x4CE4, 0x5CC5,0x2C22, 0x3C03, 0x0C60, 0x1C41, 
        0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD,0xAD2A, 0xBD0B, 0x8D68, 0x9D49, 
        0x7E97, 0x6EB6, 0x5ED5, 0x4EF4,0x3E13, 0x2E32, 0x1E51, 0x0E70, 
        0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC,0xBF1B, 0xAF3A, 0x9F59, 0x8F78, 
        0x9188, 0x81A9, 0xB1CA, 0xA1EB,0xD10C, 0xC12D, 0xF14E, 0xE16F, 
        0x1080, 0x00A1, 0x30C2, 0x20E3,0x5004, 0x4025, 0x7046, 0x6067, 
        0x83B9, 0x9398, 0xA3FB, 0xB3DA,0xC33D, 0xD31C, 0xE37F, 0xF35E, 
        0x02B1, 0x1290, 0x22F3, 0x32D2,0x4235, 0x5214, 0x6277, 0x7256, 
        0xB5EA, 0xA5CB, 0x95A8, 0x8589,0xF56E, 0xE54F, 0xD52C, 0xC50D, 
        0x34E2, 0x24C3, 0x14A0, 0x0481,0x7466, 0x6447, 0x5424, 0x4405, 
        0xA7DB, 0xB7FA, 0x8799, 0x97B8,0xE75F, 0xF77E, 0xC71D, 0xD73C, 
        0x26D3, 0x36F2, 0x0691, 0x16B0,0x6657, 0x7676, 0x4615, 0x5634, 
        0xD94C, 0xC96D, 0xF90E, 0xE92F,0x99C8, 0x89E9, 0xB98A, 0xA9AB, 
        0x5844, 0x4865, 0x7806, 0x6827,0x18C0, 0x08E1, 0x3882, 0x28A3, 
        0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E,0x8BF9, 0x9BD8, 0xABBB, 0xBB9A, 
        0x4A75, 0x5A54, 0x6A37, 0x7A16,0x0AF1, 0x1AD0, 0x2AB3, 0x3A92, 
        0xFD2E, 0xED0F, 0xDD6C, 0xCD4D,0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9, 
        0x7C26, 0x6C07, 0x5C64, 0x4C45,0x3CA2, 0x2C83, 0x1CE0, 0x0CC1, 
        0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C,0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8, 
        0x6E17, 0x7E36, 0x4E55, 0x5E74,0x2E93, 0x3EB2, 0x0ED1, 0x1EF0, 
};

/*
**name:get_crc16
**function:
**input:
**return:
*/
unsigned short get_ccitt_crc16(unsigned char data, unsigned short crc)
{
        unsigned char c;

       c = crc >> 8;
        crc <<= 8;
        crc ^= CCITT_CRC16_TABLE[data ^ c];
        return crc;
}
#elif (CRC_TYPE == 3)
const unsigned short CCITT_CRC16R_TABLE[256] = {
        0x0000, 0x1189, 0x2312, 0x329B,0x4624, 0x57AD, 0x6536, 0x74BF, 
        0x8C48, 0x9DC1, 0xAF5A, 0xBED3,0xCA6C, 0xDBE5, 0xE97E, 0xF8F7, 
        0x1081, 0x0108, 0x3393, 0x221A,0x56A5, 0x472C, 0x75B7, 0x643E, 
        0x9CC9, 0x8D40, 0xBFDB, 0xAE52,0xDAED, 0xCB64, 0xF9FF, 0xE876, 
        0x2102, 0x308B, 0x0210, 0x1399,0x6726, 0x76AF, 0x4434, 0x55BD, 
        0xAD4A, 0xBCC3, 0x8E58, 0x9FD1,0xEB6E, 0xFAE7, 0xC87C, 0xD9F5, 
        0x3183, 0x200A, 0x1291, 0x0318,0x77A7, 0x662E, 0x54B5, 0x453C, 
        0xBDCB, 0xAC42, 0x9ED9, 0x8F50,0xFBEF, 0xEA66, 0xD8FD, 0xC974, 
        0x4204, 0x538D, 0x6116, 0x709F,0x0420, 0x15A9, 0x2732, 0x36BB, 
        0xCE4C, 0xDFC5, 0xED5E, 0xFCD7,0x8868, 0x99E1, 0xAB7A, 0xBAF3, 
        0x5285, 0x430C, 0x7197, 0x601E,0x14A1, 0x0528, 0x37B3, 0x263A, 
        0xDECD, 0xCF44, 0xFDDF, 0xEC56,0x98E9, 0x8960, 0xBBFB, 0xAA72, 
        0x6306, 0x728F, 0x4014, 0x519D,0x2522, 0x34AB, 0x0630, 0x17B9, 
        0xEF4E, 0xFEC7, 0xCC5C, 0xDDD5,0xA96A, 0xB8E3, 0x8A78, 0x9BF1, 
        0x7387, 0x620E, 0x5095, 0x411C,0x35A3, 0x242A, 0x16B1, 0x0738, 
        0xFFCF, 0xEE46, 0xDCDD, 0xCD54,0xB9EB, 0xA862, 0x9AF9, 0x8B70, 
        0x8408, 0x9581, 0xA71A, 0xB693,0xC22C, 0xD3A5, 0xE13E, 0xF0B7, 
        0x0840, 0x19C9, 0x2B52, 0x3ADB,0x4E64, 0x5FED, 0x6D76, 0x7CFF, 
        0x9489, 0x8500, 0xB79B, 0xA612,0xD2AD, 0xC324, 0xF1BF, 0xE036, 
        0x18C1, 0x0948, 0x3BD3, 0x2A5A,0x5EE5, 0x4F6C, 0x7DF7, 0x6C7E, 
        0xA50A, 0xB483, 0x8618, 0x9791,0xE32E, 0xF2A7, 0xC03C, 0xD1B5, 
        0x2942, 0x38CB, 0x0A50, 0x1BD9,0x6F66, 0x7EEF, 0x4C74, 0x5DFD, 
        0xB58B, 0xA402, 0x9699, 0x8710,0xF3AF, 0xE226, 0xD0BD, 0xC134, 
        0x39C3, 0x284A, 0x1AD1, 0x0B58,0x7FE7, 0x6E6E, 0x5CF5, 0x4D7C, 
        0xC60C, 0xD785, 0xE51E, 0xF497,0x8028, 0x91A1, 0xA33A, 0xB2B3, 
        0x4A44, 0x5BCD, 0x6956, 0x78DF,0x0C60, 0x1DE9, 0x2F72, 0x3EFB, 
        0xD68D, 0xC704, 0xF59F, 0xE416,0x90A9, 0x8120, 0xB3BB, 0xA232, 
        0x5AC5, 0x4B4C, 0x79D7, 0x685E,0x1CE1, 0x0D68, 0x3FF3, 0x2E7A, 
        0xE70E, 0xF687, 0xC41C, 0xD595,0xA12A, 0xB0A3, 0x8238, 0x93B1, 
        0x6B46, 0x7ACF, 0x4854, 0x59DD,0x2D62, 0x3CEB, 0x0E70, 0x1FF9, 
        0xF78F, 0xE606, 0xD49D, 0xC514,0xB1AB, 0xA022, 0x92B9, 0x8330, 
        0x7BC7, 0x6A4E, 0x58D5, 0x495C,0x3DE3, 0x2C6A, 0x1EF1, 0x0F78, 
};

/*
**name:get_crc16
**function:
**input:
**return:
*/
unsigned short get_ccitt_crc16r(unsigned char data, unsigned short crc)
{
        unsigned char c;

        c = crc & 0xff;
        crc >>= 8;
        crc ^= CCITT_CRC16R_TABLE[data ^ c];
        return crc;
}
#endif


/*
**name:get_crc16
**function:
**input:
**return:
*/
uint16_t GetCrc16(uint8_t *p_data,uint16_t length)
{
    uint16_t crc_result = 0 ;
    uint16_t crc_buffer = 0 ;
    
    for(uint16_t i = 0 ; i < length ; i ++)
    {
#if (CRC_TYPE == 0)
        crc_result = get_crc16(p_data[i],crc_buffer);
#elif (CRC_TYPE == 1)
        crc_result = get_crc16r(p_data[i],crc_buffer);
#elif (CRC_TYPE == 2)
        crc_result = get_ccitt_crc16(p_data[i],crc_buffer);
#elif (CRC_TYPE == 3)
        crc_result = get_ccitt_crc16r(p_data[i],crc_buffer);
#endif
        crc_buffer = crc_result ;
    }
    return crc_result ;
}


/*
**name:get_crc16
**function:
**input:
**return:
*/
uint8_t CheckCrc16(uint8_t *p_data,uint16_t length , uint16_t check_data)
{
    if(GetCrc16(p_data,length) == check_data)
        return 1 ;
    else 
        return 0 ;        
}



